CLI: Improve "photoprism dl" to download multiple URLs with auth #5219

Signed-off-by: Michael Mayer <michael@photoprism.app>

internal/commands/download_help_test.go

@@ -0,0 +1,28 @@
+package commands
+
+import (
+	"testing"
+)
+
+func TestDownloadCommand_HelpFlagsAndArgs(t *testing.T) {
+	if DownloadCommand.ArgsUsage != "[url]..." {
+		t.Fatalf("ArgsUsage mismatch: %q", DownloadCommand.ArgsUsage)
+	}
+	// Verify new flags are present by name
+	want := map[string]bool{
+		"cookies":    false,
+		"add-header": false,
+		"dl-method":  false,
+	}
+	for _, f := range DownloadCommand.Flags {
+		name := f.Names()[0]
+		if _, ok := want[name]; ok {
+			want[name] = true
+		}
+	}
+	for k, ok := range want {
+		if !ok {
+			t.Fatalf("missing flag: %s", k)
+		}
+	}
+}